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Sudoku puzzles disjoint groups (Su Doku)

My database includes 656 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 4x4 box contains the digits 1 through 16. The cells with the same color must also contain the digits 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

191280 puzzles downloaded.

14 1   11 12       3   5     13    
    5   3   8 7                
    4           10           3  
    2   6   14     4 16         10
        4     14 13     5 2 16 8  
  2 6                 1        
        15 7         9   5     11
11 7             14         9   6
6   12         2             11 15
2     9   4         12 15        
        1                 10 6  
  14 11 4 5     15 2     13        
16         6 1     2   9   15    
  6           11           7    
                16 13   3   11    
    8     16   3       7 10   5 1
Showing puzzle number: 22
Puzzletype: Symmetrical Sudoku
Startnumbers: 80
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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